Ultrasonic Sensors (Reflex-Reflective, Block Style): Type - Photoelectric Diffuse Reflective Sensor; Sensing Range - 18 in (450mm); Voltage - 20-140VAC/DC; Output Mode - Light Operate; Output Configuration - PNP-MOSFET; Connection - Cable; Connection Size - 9m (30 ft); Construction - Compact, Threaded Nose 18mm; Sensing Position - Side; Response Time - 16.6ms; Beam Type - Visible Red; Material - ABS; Enclosure Rating NEMA - NEMA 6; Enclosure Rating IEC - IEC IP67; Temperature Rating - -25 to 55degC (-13 to 131degF); Manufacturer Series - QS18 Series